Mobile Apps

    iOS and Android
    App Development

    Design and develop mobile apps around a defined user need. We scope iOS and Android delivery, backend integrations, store submission, promotion and ongoing support separately, with acceptance criteria agreed before implementation.

    Discuss scope

    Service scopes

    iOS App Building

    범위별 견적

    • Agreed iOS screens, user flows and supported devices.
    • Implementation and testing of the specified features and API connections.
    • Release build and submission materials; Apple controls review and approval.
    Discuss scope

    Android App Building

    범위별 견적

    • Agreed Android screens, user flows and supported OS/device range.
    • Implementation and testing of the specified features and API connections.
    • Release build and Google Play submission materials; approval is not guaranteed.
    Discuss scope

    iOS App Promotion

    USD 750–USD 1,500/프로젝트

    • App Store listing review, keyword hypotheses and screenshot briefs.
    • Apple Search Ads setup and measurement when included in the proposal.
    • Media spend and partner fees are separate; no guaranteed installs or rankings.
    Discuss scope

    Android App Promotion

    USD 750–USD 1,500/프로젝트

    • Google Play listing review, descriptions and visual briefs.
    • Agreed Google Ads campaigns and install-event measurement.
    • Advertising spend is separate; only genuine, voluntary user reviews.
    Discuss scope

    UI/UX Design

    USD 2,000–USD 4,000/프로젝트

    • User-flow review, wireframes and an interactive prototype.
    • Agreed screen designs, reusable components and developer specifications.
    • Usability research or participant recruitment only where explicitly scoped.
    Discuss scope

    App Maintenance & Support

    범위별 견적

    • An agreed issue backlog, dependency updates and release process.
    • Crash/performance review using available telemetry and approved access.
    • Support hours, response arrangements and feature work are defined separately; no uptime guarantee.
    Discuss scope

    How we work

    Visible scope

    Screens, platforms, integrations and acceptance criteria are documented before work is agreed.

    Separate workstreams

    Development, promotion and support have their own deliverables and cost boundaries.

    Release handover

    Agree repository access, build materials, account ownership and maintenance responsibilities.

    범위, 한도 및 별도 비용

    표시된 범위에 대한 USD 서비스 요금입니다. 명시적으로 포함하지 않으면 세금, 광고, 소프트웨어/API 및 외부 비용은 별도입니다. 설정 비용도 별도이며 최종 범위와 조건은 작업 전에 합의합니다.

    아래 상세 범위는 영어로 제공하며 수행 언어는 개별 제안서에서 합의합니다.

    One brand, market and delivery language unless stated otherwise. Caps are work limits, not outcome promises. Client supplies lawful data, access and material rights. Public AI actions and content require agreed review. No rankings, leads, revenue, hiring or third-party approval guarantees.

    Contract, payment schedule, cancellation, hour rollover and support SLA require an explicit agreement. Legal, tax, investment and regulated work require the appropriate jurisdiction and an authorised professional role; this fee is not evidence of licensure.

    iOS App Building범위별 견적

    Quote/project. Actual iOS software delivery requires separate discovery/prototype/build SOWs, backend, integrations, device/OS matrix, acceptance and launch responsibilities. Discovery is not a completed app.

    Android App Building범위별 견적

    Quote/project. for actual Android delivery; device/OS testing, backend and distribution specified, rather than assuming the iOS scope/total is interchangeable.

    iOS App PromotionUSD 750–USD 1,500/프로젝트

    for a base ASO audit + metadata recommendation for one app, one store, one market/language, three competitor reviews and one revision. Paid acquisition, ongoing testing, new creative production and PR/influencers separately quoted, not included in this base.

    Android App PromotionUSD 750–USD 1,500/프로젝트

    for the same bounded Google Play ASO baseline, not combined iOS + Android or ongoing ad execution. Broader campaign quoted.

    UI/UX DesignUSD 2,000–USD 4,000/프로젝트

    for one core flow, up to eight screens, clickable design prototype/handoff and two revision rounds, one brand/language. Paid user research/testing and additional flows quoted. No production app included.

    App Maintenance & Support범위별 견적

    Quote/month after code assessment. with included triage/implementation hours, supported platforms and working-hours response terms explicitly capped. Historical remediation, new features, major OS migrations, hosting and 24/7 operations separate.

    연락처

    Discuss your project

    Share your goals, existing systems and constraints so we can prepare a scoped proposal.

    버튼을 클릭하면 개인정보 처리에 동의합니다. 개인정보처리방침

    Frequently asked questions

    How is app development priced?

    The proposal identifies platforms, screens, backend work, integrations, testing and release responsibilities. Design, promotion and maintenance are separate scopes; store accounts, hosting, licenses and ad spend are separate third-party costs.

    How is the delivery schedule agreed?

    The schedule follows requirements, available assets, API access and review steps. Changes can affect milestones; store review time and approval are outside our control.

    Should we start with iOS or Android?

    Use your audience device data, distribution market and required features to choose. Native and cross-platform approaches have different trade-offs; we assess them against the agreed requirements rather than assuming one is always better.

    Does an app guarantee revenue or compliance?

    No. Monetization depends on the offer, adoption and operating costs. Payment, privacy and regulated-use requirements need project-specific review; development or store submission does not certify compliance.

    iOS 및 Android 앱 개발 | KeyGroup